Method And Pair Of Pinching Jaws For Producing A Drilling Tip
AssigneeAdolf Wuerth GmbH & Co. KG
InventorsAndreas Wunderlich, Rainer Eckert
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Abstract
A method for integrally forming a drilling tip on a wire nail, in particular in order to produce a screw with the aid of a pair of pinching jaws, provides for the bulge formed by the displaced material during the integral forming of the drilling tip to be sheared off the drilling tip along the entire length of the cutting edges of the drilling tip produced and to be left connected to the drilling tip only along the longitudinal side edges of the latter by a predetermined breaking point.
Claims9
Method for producing a drilling tip, in particular the drilling tip of a screw, having the following method steps:
- 1.1 a wire nail (7) is positioned with one end (8) in the intermediate space between two spaced-apart pinching jaws (1),
- 1.2 the pinching jaws (1) are moved together,
- 1.3 when the pinching jaws (1) are closed, the drilling tip is formed between the two pinching jaws (1),
- 1.4 when the pinching jaws (1) are closed, the excess material is displaced into a bulge (11) surrounding the end (8) of the wire nail (7),
- 1.5 the bulge (11) is deformed at the longitudinal sides of the wire nail (7) in order to form a Predetermined breaking point,
- 1.6 the bulge (11) is separated from the wire nail (7) along the cutting edges (10) of the drilling tip,
- 1.7 after the drilling tip is removed, the bulge (11) is sheared off the wire nail (7).
Pair of pinching jaws for producing a drilling tip, in particular a drilling tip of a screw, wherein
- 6.1 each pinching jaw (1) has a depression (2) which
- 6.2 forms the negative form of the drilling tip in the closed state of the pinching jaws (1), and
- 6.3 a receiving space (4) surrounding the depression (2) and receiving the material displaced during the production of the drilling tip,
- 6.4 the boundary between the depression (2) and the receiving space (4) being formed along the two sides extending parallel to the longitudinal axis of the depression such that
- 6.5 the two pinching jaws (1) do not come into contact at this boundary in the closed state of the pair of pinching jaws, and
- 6.6 the boundary between the depression (2) and the receiving space (4) being formed along the two cutting edges (10) to be produced such that
- 6.7 the two pinching jaws (1) come at least partially into contact or overlap at this boundary in the closed state of the pair of pinching jaws.
Dependencies are inferred from the claim text.